AWS AWS Storage and Databases 4 — Questions and Answers
Question 1: Which S3 storage class is designed for data that is accessed less than once a month and requires millisecond retrieval?
- S3 Glacier Instant Retrieval (Correct answer)
- S3 Standard-IA
- S3 One Zone-IA
- S3 Glacier Flexible Retrieval
Correct answer: S3 Glacier Instant Retrieval
S3 Glacier Instant Retrieval is designed for rarely accessed archive data that still needs millisecond retrieval times.
Question 2: An application needs to store session state data with automatic expiration after 30 minutes. Which AWS service is the best fit?
- Amazon RDS
- Amazon DynamoDB with TTL (Correct answer)
- Amazon S3
- Amazon Redshift
Correct answer: Amazon DynamoDB with TTL
DynamoDB's Time to Live (TTL) feature automatically deletes items after a specified timestamp, making it ideal for session data expiration.
Question 3: What is the maximum size of a single object that can be stored in Amazon S3?
- 5 GB
- 50 GB
- 5 TB (Correct answer)
- 500 GB
Correct answer: 5 TB
Amazon S3 supports individual objects up to 5 TB in size; objects larger than 5 GB must use multipart upload.
Question 4: Which Amazon RDS feature automatically creates a standby replica in a different Availability Zone to improve availability?
- Read Replicas
- Multi-AZ deployment (Correct answer)
- Automated backups
- RDS Proxy
Correct answer: Multi-AZ deployment
RDS Multi-AZ deployment synchronously replicates data to a standby instance in another AZ, enabling automatic failover.
Question 5: Which AWS storage service provides a fully managed Network File System (NFS) that can be mounted by multiple EC2 instances simultaneously?
- Amazon EBS
- Amazon S3
- Amazon EFS (Correct answer)
- AWS Storage Gateway
Correct answer: Amazon EFS
Amazon EFS (Elastic File System) is a managed NFS that supports concurrent access from thousands of EC2 instances.
Question 6: A company needs a petabyte-scale data warehouse for complex analytical queries. Which AWS service should they use?
- Amazon RDS
- Amazon Aurora
- Amazon DynamoDB
- Amazon Redshift (Correct answer)
Correct answer: Amazon Redshift
Amazon Redshift is AWS's fully managed data warehouse optimized for complex analytical queries on petabyte-scale datasets.
Question 7: What does S3 Object Lock's 'Compliance' mode ensure compared to 'Governance' mode?
- Objects can be deleted by the root account user
- No user, including the root account, can delete or overwrite a locked object (Correct answer)
- Only IAM admins can remove the lock
- Objects are encrypted automatically
Correct answer: No user, including the root account, can delete or overwrite a locked object
In Compliance mode, a protected object version cannot be overwritten or deleted by any user, including the root account, for the duration of the retention period.
AWS AWS Storage and Databases 4
Which S3 storage class is designed for data that is accessed less than once a month and requires millisecond retrieval?